When will the driver arrive?
When the driver enters the next destination in the sat nav, the time of arrival will not only be visible for the driver on the sat nav, but also for you online. Remember that this time of arrival does not include mandatory breaks and time needed for loading or unloading, but it does include traffic jams that the sat nav knows of.
When you click on the balloon of the vehicle that is on its way to your zoo and then click on 'show', it will show you where the vehicle is, its next destination and the time of arrival.
The 'finish-flag' shows the next destination and the time next to the question mark shows the estimated time of arrival.